A flexible power distribution station

Abstract

The invention discloses a power distribution station. The power distribution station comprises a public power grid system, an energy storage system and a multipurpose interface system; wherein the public power grid system comprises a high voltage switch cabinet, a power distribution transformer and a low voltage switch cabinet which are successively connected with a public power grid and the low voltage side of the power grid; the energy storage system comprises an energy storage charging and discharging battery module and a transformer which are connected mutually, and an interface switch cabinet for connecting to the low voltage side; wherein the energy storage system also comprises a control system; and the multipurpose interface system mainly comprises a bidirectional power electronic transformer and a switch cabinet for connecting one end of the bidirectional power electronic transformer to the low voltage side. According to the flexible power distribution station provided by the invention, a netted static dynamic electric energy consumption system is provided; and the system has the advantages that the working mode is long term online working, the power loads can be balanced and translated, the system is convenient for application of distributed energy source power generation, and further the system is convenient for a third party direct power supply to access.

Description

technical field [0001] The invention belongs to the field of power distribution stations, and more specifically relates to a flexible power distribution station. Background technique [0002] With the development of social economy and the improvement of living standards, the demand for electricity is also increasing. On the one hand, the increase in demand for electricity from shopping malls, factories, and civil uses increases the requirements for grid load and grid flexibility, which increases the investment in the grid. At the same time, in order to meet the demand for flexibility, the investment efficiency of the grid is low, resulting in Waste of resources. On the other hand, some areas lack primary energy, there are no coal and water resources in the city, and wind energy resources are limited. In addition, the construction of power plants is limited. When encountering the problem of flexible demand for electricity, new technologies need to be used to Improving the p...

AI Technical Summary

Problems solved by technology

On the one hand, the increase in demand for electricity from shopping malls, factories, and civil uses increases the requirements for grid load and grid flexibility, which increases the investment in the grid. At the same time, in order to meet the demand for flexibility, the investment efficiency of the grid is low, resulting in waste of resources

On the other hand, some areas lack primary energy, there are no coal and water resources in the city, and wind energy resources are limited. In addition, the construction of power plants is limited. When encountering the problem of flexible demand for electricity, new technologies need to be used to It is an urgent problem to be solved to improve the reliability of the power supply of the power grid and to study the access mode of new electric energy to realize the flexible power supply.

[0003] In order to realize the utilization of energy, one of the technologies currently used is to use the energy storage battery system to store energy so as to realize the function of peak load shifting and valley filling to improve the utilization efficiency of electric energy. This access method is not flexible enough. , there are still the following problems, for example: the traditional urban and rural power distribution system is generally provided to the low-voltage power load by the 10 kV public power grid after stepping down the transformer. , so that the average load rate of the power transformer is about 20%, which not only causes waste of resources, but also increases the burden of electricity charges on users

Especially for industrial and commercial power users, the peak-to-trough electricity consumption rule takes the day as the cycle, not only using the highest priced electricity (peak electricity price), but also paying a huge one-time investment price and long-term fixed capacity electricity fee for manufacturing peak loads ; The second problem is that it has not solved the problem of flexible energy supply

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